Windows is selling data from what you do and making money and you just aren't noticing the ads are tailored to you.
It's the type of thing that seems harmless, unless you are a woman searching for an abortion provider and Microsoft sells that, and then an ultra-right wing religious majority comes to power and decides to retroactively put to death all women who have had an abortion and use that data to put you to death.
This surveilance mechanism is mostly harmless... until one day it's not.